diff --git a/addons/stock/models/stock_inventory.py b/addons/stock/models/stock_inventory.py
index b4652226d7d..6b067851bdf 100644
--- a/addons/stock/models/stock_inventory.py
+++ b/addons/stock/models/stock_inventory.py
@@ -184,7 +184,7 @@ class Inventory(models.Model):
         })
 
     def action_start(self):
-        for inventory in self:
+        for inventory in self.filtered(lambda x: x.state not in ('done','cancel')):
             vals = {'state': 'confirm', 'date': fields.Datetime.now()}
             if (inventory.filter != 'partial') and not inventory.line_ids:
                 vals.update({'line_ids': [(0, 0, line_values) for line_values in inventory._get_inventory_lines_values()]})